Heat insulation properties of silica aerogel/glass fiber composites fabricated by press forming
Heat insulation properties of silica aerogel/glass fiber composites fabricated by press forming
复制标题
压制成型二氧化硅气凝胶/玻璃纤维复合材料的隔热性能
DOI:
10.1016/j.matlet.2012.01.114
复制
发表时间:
2012-05
影响因子:
3
通讯作者:
Li, Hongxia
中科院分区:
文献类型:
--
作者:
Ding, Shuqiang;Wang, Dongdong;Wang, Gang;Li, Hongxia
Silica aerogel/glass fiber composites were fabricated by press forming of silica aerogel powders and dispersed glass fibers. Due to the nano porous structure, silica aerogel showed low gas thermal conductivity and solid thermal conductivity. By adding the glass fibers, the strength of the composites was improved but the heat insulation property was deteriorated. The thermal conductivities of the composites with 20wt.% glass fibers at 300°C and 600°C were 0.025W/(m K) and 0.030W/(m K), respectively. As opacifier, the addition of TiO2decreased the radiative thermal conductivity abruptly, especially at high temperatures. At 700°C, it decreased from 0.041W/(m K) to 0.030W/(m K) after 20wt.% TiO2powders were added.
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DOI:
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DOI:
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